I can use tor to access other exchanges too.
What do you mean? How exactly? You need a .onion site.
No, you need to install tor and force the web traffic through it.
Preferably by running the browser inside a torified virtual machine or alternatively by using tools like Proxifier.
Well the exchange is (according to the screenshot) an .onion site. Like Silkroad. Can't access it without Tor. And the first .onion exchange.
This will probably make the exhange work much more fluent and safe?